enemy.js

class Enemy {

  constructor (x, y, width, height, colour) {

    this.x = x;
    this.y = y;
    this.width = width;
    this.height = height;
    this.colour = colour;
    this.dirX = -gameSpeed;

  }

  update() {

    this.x += this.dirX;
    this.draw();
    this.dirX = -gameSpeed;

  }

  //npc crt
  draw() {

    ctx.drawImage(racerImg, this.x, this.y, this.width, this.height)
    
  }
}